Picked up IF Bellingham to play in a cheap meta squad while having majority of coins invested elsewhere. Played him as LCM ingame in a box-to-box role (some games with balanced attack, some with get forward). The TL:DR is that Bellingham is an absolute bargain and performs almost perfectly in the b2b role.
His main attribute is his smooth feeling ingame, especially on the ball, which i guess is reflected very well in high dribbling stats and very good balance/agility. His stamina is also very high, which means he can easily play the whole game even with his perfect H/H workrates. His passing was very good, and his interceptions were also very decent. What surprised me the most about him was his strength and ability to win the ball back. Shooting wasn't great, but passable - probably his weakeast attribute. All in all a perfect cheap B2B cm. I'd compare him to players like IF Barella, Llorente and Goretzka. Specifically, he felt a lot like Marcos Llorente with worse finishing to me.
All my games were played in Div3. I used engine for the first few games and switched to shadow for the extra pace mostly, which didn't seem to hinder his dribbling/passing much.
Squad used in:
https://www.futbin.com/22/squad/2266176 (Ingame, starting formation 4222 for chem).
Dribbling & smooth feeling on the ball
Winning the ball & strength
Somewhat poor links